Browsing by Author "Prisner, Thomas"

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    Electron spin echo determination of spin diffusion in the one-dimensional conductor (fluoranthenyl)2+(PF6)x-(SbF6)1-x-(x ≈ 0.5)
    (1983) Sigg, Jakob; Prisner, Thomas; Dinse, Klaus Peter; Brunner, Hermann; Schweitzer, Dieter; Hausser, Karl H.
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    Electron-spin-echo experiments on the one-dimensional conductor [(fluoranthene)2]+[(PF6)x(SbF6)1-x]- (x≈0.5)
    (1983) Sigg, Jakob; Prisner, Thomas; Dinse, Klaus Peter; Brunner, Hermann; Schweitzer, Dieter; Hausser, Karl H.
    The electron-spin-echo decay function was determined for the conducting phase of [(C16H10)2]+X- in the temperature range 183-300 K. The decay function exhibited an exp[-(γt)3/2] dependence, characteristic of one-dimensional spin diffusion. The ratio 5×106≤D∥/D⊥≤5×108 for the inner-stack-to-out-of-stack diffusion rates was determined from the characteristic time t0, at which the electron-spin-echo decay function changed to the "conventional" exp(-2γ′τ)) form. The deduced value 2×1013≤D∥≤2×1016 rad/s is consistent with the bulk dc conductivity and with recently determined nuclear spin-lattice relaxation rates. The overall assumption of highly mobile electronic spins was confirmed by an Overhauser-type experiment.
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    Pulsed ESR investigation of spin transport properties in the organic conductor (perylenyl)2(AsF6)0.75(PF6)0.35 · 0.85CH2Cl2
    (1987) Dobbert, Olaf; Prisner, Thomas; Dinse, Klaus Peter; Schweitzer, Dieter; Keller, Heimo J.
    Spin transport properties in the organic conductor (perylenyl2)+ X- were studies in the temperature range of 4-300 K. Being constant in the "metallic" range (Dmid = 1.8(2)cm2s-1, the diffusion constant Dmid exhibits a temperature activated behaviour in the low temperature range, at variance with the prediction invoking the model of an intrinsic semiconductor. A low-temperature divergence of the homogenous ESR line width, indicative of one-dimensional fluctuations, was also observed.